The Bojon Gourmet

Make the dough
0 If using fresh berries, rinse and dry them, then place them in a loaf pan or pie plate in a single layer and freeze until firm, about 20 minutes.
1 Meanwhile, in a large bowl (or the bowl of a stand mixer fitted with the paddle), combine the flours, sugar, baking powder and salt. Add the butter, and work in with your fingertips or a pastry blender (or mix on low) until the butter has broken down into tiny bits with some larger, pea-sized chunks remaining.
2 Use a flexible silicone spatula to gently stir in the frozen berries. Begin drizzling in the cream, tossing gently with the spatula (or a plastic bench scraper or your hands), adding cream directly to the dry bits, until the dough will hold together and no floury bits remain. You might not need all the cream.
Shape
3 Gently press the dough into a ball and place on a surface dusted lightly with buckwheat flour. Pat the dough into a 6" round that is 1 1/4" high. Cut the dough into 8 wedges. Place the scones evenly apart on a baking sheet lined with parchment paper. Freeze until firm, about 45 minutes. (At this point, you can wrap and freeze the scones to bake off later.)
Bake
4 Meanwhile, position a rack in the upper-center of the oven and preheat to 425ºF.
5 Remove the scones from the freezer, brush with cream and sprinkle with the coarse sugar.
6 Bake the scones until they are golden brown, 20-25 minutes. Remove immediately from the pan to prevent blueberry goo-induced sticking. Let cool until warm as the scones are still cooking from residual heat. Serve warm with crème fraîche and extra berries.
Storage
7 The scones will keep for up to 3 days at room temperature. For most delectable results, re-heat in an oven or toaster oven before serving.